<template>
  <div class="header">
    <!-- 折叠按钮 -->
    <div class="collapse-btn" @click="collapseChage">
      <i v-if="!collapse" class="el-icon-s-fold"></i>
      <i v-else class="el-icon-s-unfold"></i>
    </div>
    <div class="logo" style="display: flex;align-items: center;"><img src="../../assets/img/logo.png" style="width: 40px;height: 40px;border-radius: 40px;margin-right: 10px;" /> YYC松鼠短视频系统

    <i>v4.2.9</i>

    </div>
    <div class="header-right">
      <div class="header-user-con">
        <!-- 全屏显示 -->
        <div class="btn-fullscreen" @click="handleFullScreen">
          <el-tooltip effect="dark" :content="fullscreen?`取消全屏`:`全屏`" placement="bottom">
            <i class="el-icon-rank"></i>
          </el-tooltip>
        </div>
        <!-- 消息中心 -->
        <div class="btn-bell">
          <el-tooltip effect="dark" :content="message?`有${message}条未读消息`:`消息中心`" placement="bottom">
            <router-link to="https://bbs.youyacao.com/forum-57-1.html">
              <i class="el-icon-bell"></i>
            </router-link>
          </el-tooltip>
          <span class="btn-bell-badge" v-if="message"></span>
        </div>
        <!-- 用户头像 -->
        <div class="user-avator">
          <img src="../../assets/img/logo.png"/>
        </div>
        <!-- 用户名下拉菜单 -->
        <el-dropdown class="user-name" trigger="click" @command="handleCommand">
          <span class="el-dropdown-link">
            {{username}}
            <i class="el-icon-caret-bottom"></i>
          </span>
          <el-dropdown-menu slot="dropdown">
            <a href="https://doc.youyacao.com/web/#/17?page_id=185" target="_blank">
              <el-dropdown-item>技术接口</el-dropdown-item>
            </a>
            <a href="https://doc.youyacao.com/web/#/4?page_id=26" target="_blank">
              <el-dropdown-item>安装教程</el-dropdown-item>
            </a>
            <el-dropdown-item divided command="loginout">退出登录</el-dropdown-item>
          </el-dropdown-menu>
        </el-dropdown>
      </div>
    </div>
  </div>
</template>
<script>
import bus from '../common/bus'

export default {
  data () {
    return {
      collapse: false,
      fullscreen: false,
      name: 'admin',
      message: 2
    }
  },
  computed: {
    username () {
      console.log(this.$store.state)
      return this.$store.state.user ? this.$store.state.user.username : 'guest'
    }
  },
  methods: {
    // 用户名下拉菜单选择事件
    handleCommand (command) {
      if (command == 'loginout') {
        this.$api.login.logout({}).then(res => {
          localStorage.removeItem('admin')
          this.$router.push('/login')
        })
      }
    },
    // 侧边栏折叠
    collapseChage () {
      this.collapse = !this.collapse
      bus.$emit('collapse', this.collapse)
    },
    // 全屏事件
    handleFullScreen () {
      let element = document.documentElement
      if (this.fullscreen) {
        if (document.exitFullscreen) {
          document.exitFullscreen()
        } else if (document.webkitCancelFullScreen) {
          document.webkitCancelFullScreen()
        } else if (document.mozCancelFullScreen) {
          document.mozCancelFullScreen()
        } else if (document.msExitFullscreen) {
          document.msExitFullscreen()
        }
      } else {
        if (element.requestFullscreen) {
          element.requestFullscreen()
        } else if (element.webkitRequestFullScreen) {
          element.webkitRequestFullScreen()
        } else if (element.mozRequestFullScreen) {
          element.mozRequestFullScreen()
        } else if (element.msRequestFullscreen) {
          // IE11
          element.msRequestFullscreen()
        }
      }
      this.fullscreen = !this.fullscreen
    }
  },
  mounted () {
    if (document.body.clientWidth < 1500) {
      this.collapseChage()
    }
  }
}
</script>
<style scoped>
  .header {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    height: 70px;
    font-size: 22px;
    color: #fff;
  }

  .collapse-btn {
    float: left;
    padding: 0 21px;
    cursor: pointer;
    line-height: 70px;
  }

  .header .logo {
    float: left;
    width: 350px;
    line-height: 70px;
  }

  .header-right {
    float: right;
    padding-right: 50px;
  }

  .header-user-con {
    display: flex;
    height: 70px;
    align-items: center;
  }

  .btn-fullscreen {
    transform: rotate(45deg);
    margin-right: 5px;
    font-size: 24px;
  }

  .btn-bell,
  .btn-fullscreen {
    position: relative;
    width: 30px;
    height: 30px;
    text-align: center;
    border-radius: 15px;
    cursor: pointer;
  }

  .btn-bell-badge {
    position: absolute;
    right: 0;
    top: -2px;
    width: 8px;
    height: 8px;
    border-radius: 4px;
    background: #f56c6c;
    color: #fff;
  }

  .btn-bell .el-icon-bell {
    color: #fff;
  }

  .user-name {
    margin-left: 10px;
  }

  .user-avator {
    margin-left: 20px;
  }

  .user-avator img {
    display: block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
  }

  .el-dropdown-link {
    color: #fff;
    cursor: pointer;
  }

  .el-dropdown-menu__item {
    text-align: center;
  }
</style>
